Engine enclosure for a harvesting machine

ABSTRACT

A self-propelled combine has a mobile main separator body with an elevated grain tank mounted on a central portion of the body and a forward operator&#39;&#39;s station and engine enclosure mounted side-by-side at the forward end of the body immediately in front of the grain tank. The engine enclosure has an air outlet in its outer lateral side and air inlets in both the top and front side of the enclosure. A transversely oriented internal combustion engine is mounted in the enclosure and has a radiator opposite the outlet opening. A fan in the outlet opening draws air through the inlet openings and through the radiator, discharging it through the outlet opening at the side of the combine. The air drawn through the radiator is filtered by means of screens in the air inlets, and the top and front of the enclosure are provided with louvers to deflect part of the air along the surface of the screens to carry away foreign material collected therein, the contaminated air bypassing the radiator and being discharged out the side of the combine with the cooling air.

United States Patent [1'91 Vogelaar et al.

[ 1 Jan. 22, 1974 ENGINE ENCLOSURE FOR A HARVESTING MACHINE [73] Assignee: Deere & Company, Moline, Ill.

[22] Filed: Dec. 21, 1970 [21], Appl. No.: 100,542

Related US. Application Data [62] Division of Ser. No. 852,689, Aug. 25, 1969, Pat. No.

[52] US. Cl. 180/68 R, 180/69 R [51] Int. Cl B60k 11/04 [58] Field of Search 180/68, 69, 54 A; 56/l6.7,

[56} References Cited UNITED STATES PATENTS 3,630,003 12/1971 Ashton et a1 180/68 R X 1,081,023 12/1913 DeFevre et al. l80/54 A UX 2,272,278 5/1941 Yonkers, Jr. 55/471 X 3,358,787 12/1967 Bangasser et al.... 180/69 3,565,203 2/1971 Ashton et al 180/68 R 3,179,197 4/1965 Peras ISO/54A Primary Examiner-Kenneth I-l. Betts Assistant Examiner-Milton L. Smith 5 7 ABSTRACT A self-propelled combine has a mobile main separator body with an elevated grain tank mounted on a central portion of the body and a forward operators station and engine enclosure mounted side-by-side at the forward end of the body immediately in front of the grain tank. The engine enclosure has an air outlet in its outer lateral side and air inlets in both the top and front side of the enclosure. A transversely oriented internal combustion engine is mounted in the enclosure and has a radiator opposite the outlet opening. A fan in the outlet opening draws air through the inlet openings and through the radiator, discharging it through the outlet opening at the side of the combine. The air drawn through the radiator is filtered by means of screens in the air inlets, and the top and front of the enclosure are provided with louvers to deflect part of the air along the surface of the screens to carry away foreign material collected therein, the contaminated air bypassing the radiator and being discharged out the side of the combine with the cooling air.

23 Claims, 9 Drawing Figures PATENTED JAN 2 2 5374 SHEEI 2 IF 6 FIG. 2

PATENTED JAN 2 2 I974 SHEET 3 BF 6 FIGS ENGINE ENCLOSURE FOR A HARVESTING MACHINE CROSS REFERENCE TO RELATED APPLICATIONS This is a division of application Ser. No. 852,689, filed Aug. 25, 1969 and now U.S. Pat. No. 3,636,684 issued Jan. 25, 1972.

BACKGROUND OF THE INVENTION This invention relates to self-propelled agricultural machines, such as a combine or the like, and more particularly to an engine enclosure and its arrangement such a machine.

Self-proppelled combines conventionally have a forward elevated operators station to afford the operator adequate visibility during the operation of the machine. However, the engines in such combines have been arranged in a wide variety of locations on the combine, each of the locations having certain advantages and disadvantages. In most modern combines, the engines have been elevated, the operators station, the engine, and at least a portion of the grain tank being mounted on the combine body generally above the separating mechanism. In many combines, the engine is located to the rear of the grain tank, isolating the operator from the engine heat and noise. Such an engine location, of course, complicates the engine controls, and, in some cases, increases the overall height of the machine. In many other modern combines, the engine is located toward the front of the combine, adjacent to the operators station, the engine in some instances being immediately to the rear of the operators station and in other instances being located laterally adjacent to the operators station, the engine and operators station being disposed on opposite sides of the combine. Such arrangements have, of course, reduced the complexity of the engine controls. However, the location of the engine adjacent to the operator subjects the operator to engine heat and noise.

Another problem associated with combine engines is the filtration of the engine cooling air. Combines, of course, operate in an extremely dirty and trashy environment, and without filters for the engine cooling air, the radiator would quickly become plugged and inoperative. Many different air filter arrangements have been utilized to clean the cooling air, some of which have utilized rotating self-cleaning screens, while others have utilized a system wherein the air flow is periodically reversed to clean the screens. Such mechanisms are obviously expensive and add to the durability and maintenance problems of the machine.

SUMMARY OF THE INVENTION According to the present invention, a self-propelled combine is provided with a novel engine enclosure for its internal combustion engine. Also, an improved cooling air filtration system is provided in association with the engine enclosure.

An important feature of the invention resides in the use of a cooling air filtration system wherein the filters are self-cleaning but have no moving parts. More specifically, an engine enclosure is provided having a cooling air intake with filter elements and means for directing a portion of the air drawn through the intake along the outer surface of the filter elements to carry away foreign material collected thereon, bypassing the engine radiator. Still more specifically, the engine cooling air is drawn through banks of louvers adjacent to air filtering screens, the louvers deflecting a portion of the air so that it passes along the exterior surface of the screens.

Another important feature of the invention resides in the provision of an improved engine enclosure for an engine located adjacent to the operators station. More specifically, an engine enclosure and engine cooling system is provided wherein the air flow to the engine enclosure is directed away from the operators station so that dust in the environment and heat from the engine are drawn away from the operator, the heated air being discharged at the side of the combine remote from the operators station.

- Another feature of the invention resides in an engine enclosure and cooling air system which decreases the noise level at the adjacent operators station.

Still another feature resides in the provision of an attractive, highly stylized engine enclosure, which provides easy access to the engine for maintenance and repair thereof. Another feature of the engine enclosure resides in the provision of an engine enclosure having a fold-down panel at the front of the engine to provide a work platform or catwalk for working on the engine.

Still another feature of the invention resides in the arrangement of the engine in a transverse disposition with the engine enclosure adjacent to the operators station, the output shaft extending toward the operators station and under the operators seat, the transverse arrangement of the output shaft eliminating the necessity for gear boxes and transmitting the power to the various conventional belt drives along the sides of the combine.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a right side, front perspective view of a selfpropelled combine embodying the invention.

FIG. 2 is an enlarged perspective view similar to FIG. 1, showing only the engine enclosure area of the combine, with portions of the enclosure broken away to more clearly illustrate the invention.

FIG. 3 is a top front perspective view of the upper portion of the combine, with a door in the top of the engine enclosure raised. I

FIG. 4 is a front perspective view of the engine enclosure with the doors in the front wall in an open condition.

FIG. 5 is a top front perspective view of the engine enclosure with the top and front swung to open positions to expose the engine within the enclosure.

FIG. 6 is a top schematic view of the engine and engine enclosure.

FIG. 7 is a front schematic view of the engine enclosure shown in FIG. 6.

FIG. 8 is a perspective view of a second embodiment of the engine enclosure, with portions of the engine enclosure removed to more clearly illustrate the invention.

FIG. 9 is a perspective view of a third embodiment of the invention, utilizing the air filtration system for the radiator of an exposed engine.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention is embodied in a self-propelled combine, which is shown in its entirety in FIG. 1. The combine includes a main separator body mounted on a pair of forward drive wheels 12 and steerable rear wheels 14. The combine carries a forward, transversely elongated harvesting platform 16, which removes the crop from the field and delivers it rearwardly to the main separator body 10 through a forward feeder housing 18. The feeder housing 18, as is conventional, extends forwardly from the main separator body and is vertically adjustable relative thereto about a transverse pivot at the forward end of the body, the vertical adjustment of the feeder housing 18 conventionally being accomplished by a pair of hydraulic cylinders (not shown) operative between the body and the feeder housing. The feeder housing 18 includes opposite upright side walls 22 and an upwardly and rearwardly inclined top wall 24, which is provided with a flat, generally horizontal platform or step 26 extending the width of the feeder housing.

The main separator body has substantially the same width as the feeder housing 18, the sides of the body 10 being substantially aligned with the side walls 22 of the feeder housing. Mounted on top of the body at approximately the center thereof, is an elevated grain tank, indicated in its entirety by the numeral 28. The grain tank 28 includes opposite side walls 30 and 31, upright front and rear walls 32 and 33 respectively, and a horizontal, open top 34. As is apparent, the side walls 30 and 31 are spaced outwardly from the side walls of the body 10, so that the grain tank 28 overhangs both sides of the body.

An elevated operators station, indicated generally by the numeral 36, is mounted on the main separator body 10 immediately forward of the grain tank front wall 32, at the left forward corner of the combine body. It is to be understood that the terms left and right, as well as such terms as fore-and-aft, rear, etc., are with reference to a person facing in the direction of travel of the combine during its harvesting'operation. The operators station has a horizontal floor 38 having a forward end 40 forwardly of the main separator body and generally above the left drive wheel 12 and the feeder housing 18. The left side 41 of the floor is disposed slightly outwardly of the left side wall 31 of the grain tank, so that the operators station projects from the body both to the left side and to the front. An upright steering column 42 extends upwardly from the forward end 40 of the floor and carries a steering wheel as well as other control levers. Directly behind the steering column 42 is a seat 44, which is mounted on a raisable hood structure 46 at the rear end of the floor 38. A generally fore-and-aft, upright control console 48, having various controls and gauges for the harvesting machinery and other combine components, is disposed at the right side of the operators station.

Mounted on the right front corner of the body 10, laterally adjacent to the operators station 36 and immediately forwardly of the grain tank 28, is an engine enclosure, indicated generally by the numeral 50. The engine enclosure includes a horizontal floor S1, slightly below the level of the operators station floor 38, and an internal combustion engine 52 is mounted within the enclosure and supported above the floor 51. As is apparent in FIG. 5, the engine is transversely oriented, having a transverse output shaft, which extends laterally to the left under the control console 48 and the hood 46 on which the seat is mounted. The arrangement of the engine output shaft, and the various combine drive elements associated therewith, is shown in copending application Ser. No. 767,689, filed Oct. 15, 1968 and now U.S. Pat. No. 3,583,518 issued June 8, 1971, and assigned to the assignee herein.

As shown in FIG. 5, the engine 52 has a heat exchanger or radiator 54 of conventional construction at the right-hand end of the engine, within the engine enclosure 50. The radiator 54 is mounted in an upright fore-and-aft position, and is connected to the engine by conventional radiator hoses 55, which circulate cooling water to and from the engine 52 through a conventional perforated radiator core 56. A coolant reservoir 57 is mounted on top of the radiator core 56, both the core and the reservoir substantially spanning the foreand-aft length of the engine enclosure.

The engine 52 also includes an exhaust pipe 58 which extends through the front wall 32 of the grain tank and exits from the grain tank at an opening 59 in the right grain tank side wall 30. Similarly, an air intake pipe 60 extends from the engine carburetor through the grain tank front wall 32 to an air cleaner 61 disposed within the grain tank. As is apparent, the front wall 32 functions as the rear wall of the engine enclosure 50.

The engine enclosure 50 has a generally upright inner or left side wall 62 laterally adjacent to the control console 48. The inner side wall 62 is provided with an opening through which the output end of the engine extends. The inner side wall 62 extends forwardly from the front wall 32 of the grain tank and has a horizontal top edge 63 and a generally upright front edge 64, the front edge 64 being inclined slightly forwardly from top to bottom. As is apparent, the inner side wall is dis posed approximately on the fore-and-aft center line of the combine. The engine enclosure has an outer or right side wall 65 opposite the inner side wall and in general fore-and-aft alignment with the right side wall 30 of the grain tank. The outer side wall 65 has substantially the same outer configuration as the inner side wall, having a horizontal top edge 66 and a slightly inclined front edge 67 parallel to the edge 64. The outer side wall has an inner panel 68, which is provided with a central circular discharge opening 69, and a grill or screen 70 substantially covering its entire outer surface.

A radially bladed fan 72 is journaled coaxially within the circular discharge opening 69, the fan having substantially the same diameter as the opening. The fan is driven in a clockwise direction as viewed from the right side of the combine and moves air from the engine enclosure interior laterally outwardly through the discharge or air outlet opening 69. Since the radiator 54 is interposed between the fan 72 and the engine 52, it is necessary that the fan drive from the engine circumvent the radiator, and to that end a first or inner belt drive 74 is provided to drive a transverse shaft 76 in front of the radiator, the shaft 76 in turn driving a second or outer belt drive 78, which is connected to the fan.

The radiator 54 is spaced from the inner panel 68 and is provided with an outwardly extending flange or panel 80 having a horizontal top edge 82 generally parallel to the top edges of the side walls, and a slightly inclined front edge 84, which is also substantially parallel to the front edges of the side walls. Since the radiator is spaced from the panel 68, a relatively narrow upright chamber 86 is formed therebetween.

The box-like engine enclosure 50 is completed by a generally horizontal top 88, which extends forwardly from the grain tank wall 32 between the opposite side walls 62 and 65, and a generally upright front wall 90, which extends between the forward end of the top 88 and the floor 51 between the opposite side walls. The front wall 90 includes a lower panel or door 92 which extends the width of the front wall and comprises approximately the lower one-third of the front wall. The lower panel 92 is mounted on a pair of hinges 93 at its bottom edge, and is swingable on said hinges from a generally upright closed position, as shown in FIG. 3, to a generally horizontal open position, as shown in FIG. 4. As is apparent, when the lower panel is swung to its open position, it extends forwardly from the engine enclosure at approximately the same level as the engine enclosure floor 51, providing a convenient work platform or catwalk for working on the engine.

The remaining part of the front wall 90 is formed by a louvered upper portion 94, which includes a rectangular frame 96, the opposite sides of which seat on recesses along the front edges 64 and 67 of the side walls. The frame 96 also has a vertical frame member 97 adjacent to and parallel to the right end of the frame, the

frame member 97 seating against the upper portion of the front edge 84 on the radiator flange, the edge 84 preferably being provided with a sealing material on its outer surface. The frame 96 has a rectangular, interior opening, which extends laterally from the frame member 97 to the opposite or inner end of the frame adjacent the inner side wall. A rectangular screen or filter, having a relatively fine mesh, is removably mounted in the frame over said opening to filter the air drawn through the opening and through the radiator core by the fan, the screen mesh being sufficiently fine to filter out any foreign material in the air that would tend to plug the radiator core.

Mounted in the frame 96 opposite the screen 98 and spaced a relatively short distance therefrom, are a pair of louvered doors 100 and I02, the right-hand louvered door 100 being mounted for swinging about a vertical axis at its right-hand end adjacent the frame member 97 and the left-hand door being mounted for swinging about a vertical axis at its left-hand end adjacent the inner side wall 62. As is apparent from FIG. 3, the doors 100 and 102 cover the exterior side of the screen when they are in their closed position, and are swingable to an open position, as shown in FIG. 4, wherein the screen is completely exposed for easy removal. Each door is formed by a number of vertically extending overlapping louvers or vanes 104, the louvers being inclined rearwardly and to the right forming vertically extending openings 106 between adjacent louvers. Thus, air enters the engine enclosure through the openings 106 and at least a portion of the air is deflected toward the right along the outer surface of the screen. A closed, louver-like end panel 108 is provided at the right end of the right door 100 opposite the chamber 86, so that the louver openings 106 are only arranged opposite the screen 98.

The engine enclosure top 88, like the front wall 90, has a rectangular, open, top frame 110, which forms the periphery of the enclosure top, the opposite lateral ends of the frame seating on recesses in the top edges 63 and 66 of the side walls. A fore-and-aft frame member 1 12 adjacent the right end of the frame seats on the top edge 82 of the radiator flange, the edge 82 again being'provided with a gasket-like material to seal the chamber 86 from the rest of the engine enclosure except for the passages through the radiator core. A rectangular top screen or filter 114 is removably mounted on the frame over the central opening, the top screen being similar to and having the same mesh as the front scren 98. A louvered top door 116 substantially covers the entire top frame and is mounted thereon by means of a transverse hinge 117 at the rear end of the door 116. The top door 116 is swingable from its normally closed position, as shown in FIGS. 1 and 2, to an upright vertical position, as shown in FIG. 3, providing access to the top screen 114 for easy removal or cleaning thereof. The area of the top door H6 opposite the screen is formed by a number of fore-and-aft, overlapping vanes or louvers 118 having the same configuration as the louvers in the front wall and forming foreand-aft extending openings 120 between the adjacent louvers, the openings 106 and 120 forming the air inlet means for the engine enclosure. Like the louvers in the front wall, the top louvers operate to deflect at least a portion of the air moving through the openings 120 laterally to the right along the surface of the top screen 1 14.

The entire top 88 is swingable about a transverse hinge 124 between the rear end of the top frame 110 and the wall 32, and the entire, upper portion 94 of the front wall 90 swingably depends from the front edge of the top 88, so that the entire enclosure top and the upper portion of the front wall are swingable upwardly and rearwardly to a vertical position wherein they expose the top and front of the engine enclosure, as shown in FIG. 5.

A flat, horizontal sound deflector or baffle 126 is mounted in the topdoor 116, the sound baffle being spaced above the upper surface of the top door 116 and having an acoustical liner 128 on its lower side opposite the openings 120 in the top. The sound deflector or baffle reduces the exposure of the operator to both the heat and the noise emanating from the top of the engine enclosure.

As is apparent from the drawings, the engine enclosure blends with the remainder of the combine to provide an attractive overall combine appearance. As is also apparent, the engine enclosure permits easy access to the engine therein for engine maintenance. Also, since the air flow through the engine enclosure moves from the openings in the top and the front of the enclosure and laterally outwardly out the side of the enclosure away from the operators station, the heat and noise from the engine are directed away from the operator.

The filtration system for the cooling air flow through the engine enclosure can best be appreciated from FIG. 2 and the schematic illustrations in FIGS. 6 and 7. As shown by the arrows in said figures, the air and foreign material carried by the air enter through the openings 106 between the louvers 104 in the front wall 90 and through the openings 120 between the louvers 118 in the top 88. The air and foreign material entering the openings in the top and front wall are deflected laterally toward the right side of the combine by the louvers, which function as deflector vanes. However, most of the air is pulled through the top screen I 14 or the front screen 98, and after passing around the engine, such air is drawn through the radiator core 56 and discharged out the side of the combine by the fan 72. However, the

foreign material has a greater mass than the air and consequently a greater inertia, and since it is deflected laterally, its momentum carries it laterally along the exterial sides of the screens until it reaches the chamber 86 at the right end of the enclosure, a relatively small portion of the air also moving along the exterior sides of the screens with the foreign material. The air moving along the exterior sides of the screens tends to pick up any foreign material accumulating on the screens, so that the screens are self-cleaning. The air and foreign material moving along the top of the top screen 114 move over the top of the radiator into the chamber 86, from which it is discharged through the opening 69 by the fan 72 along with the air moving through the radiator core, while the air and foreign material moving laterally along the exterior of the front screen 98 move around the front of the radiator into the chamber 86 from which it is similarly discharged. The proportion of the air filtered through the screens and the proportion of the air bypassing the radiator and cleaning the screens depends somewhat on the angle and configuration of the louvers. In the illustrated embodiment, approximately 85 percent of the total air drawn into the engine enclosure moves through the screen, while approximately percent of the air cleans the screens and bypasses the radiator.

As is apparent, the doors in the top and front wall also provide easy access to the screens, in the event that they need additional cleaning. However, if the screens do become partially clogged due to an unusually contaminated environment, the percentage of air drawn through the screens will automatically decrease, to increase the amount of cleaning air.

A slightly different embodiment of the engine enclosure is partially shown in FIG. 8, although the alternate arrangement shown in FIG. 8 utilizes the same basic principle for filtering the cooling air. The engine enclosure again includes a generally horizontal top 130 and a generally upright front wall 132. The top and front wall are provided with laterally extending louvers 134, the louvers again overlapping and having air inlet openings between the adjacent louvers. lnteriorly of the louvered top and front wall are filter elements or screens 136. The screens are spaced from the louvers as in the previous embodiment, and a transversely extending duct 138 communicates with the space between the front wall louvers and screen at the bottom of the front wall. The fan 72 in the outer side wall is mounted in a fan shroud 140 having a generally cylindrical opening 142, the fan blades moving closely adjacent to the wall of the opening 142. The bottom wall of the cylindrical opening 142 communicates with a vertical passage or duct 144, which in turn is connected to the transverse duct 138 by a horizontal passage 146.

The air moving through the openings between the louvers in the top 130 is deflected forwardly, a portion of the air moving forwardly along the top surface of the screen, with the remainder of the air being drawn through the screen, and through the radiator core for discharge out the side of the engine enclosure. Similarly, the air moving through the openings in the front wall 132 is deflected downwardly, with most of the air being drawn through the front screen 136, while a portion of the air is de-flected downwardly across the front surface of the screen. The air moving forwardly along downwardly across the forward side of the forward screen through the duct v138. The fan moving past the vertical passage 144 in the lower wall of the opening 142 creates a suction in the vertical passage 144, so that the air and foreign material in the collector duct 138 is drawn through the passage 146 and the passage 144 and discharged out the side of the combine with the cooling air moving through the radiator core 56.

While the above-described air filtration system is advantageously incorporated in the engine enclosure for a front-mounted combine engine, the same principle could be utilized in air filtration systems for other engine locations, such as shown in FIG. 9, wherein a combine engine 150 is transversely oriented behind an elevated grain tank 152, which is a common arrangement for combine engines. The engine 150 has an upright radiator 1S4 adjacent the side of the combine and a conventional fan [56 is mounted in a fan shroud 157 between the engine and the radiator and is operative to draw air through the radiator 154 toward the engine. The air cleaning system is located on the outer or intake side of the radiator and includes a vertical rear wall 158 extending laterally from the rear end of the radiator, a horizontal top wall 160 extending laterally from the top of the radiator between the grain tank and the rear wall 158, and a generally upright side wall 162, which is aligned with the outside wall of the grain tank and extends between the grain tank and the rear wall 158. The top and side walls 160 and 162 are again louvered, and have filter screens (not shown) spaced inwardly from the openings between the louvers. Most of the air drawn through the louver openings passes through the screens and through the radiator 154, and is discharged toward the engine by the fan 156. However, a portion of the air drawn through the top 160 is deflected laterally along the top of the associated screen and is then deflected downwardly along the outer surface of the side screen. Similarly, a portion of the air moving through the side louver openings is deflected downwardly along the exterior side of the side screen, and the air moving along the exterior sides of the screens is again collected in a duct [64 at the bottom edge of the side wall 162. The collector duct 164 communicates with a transverse transfer duct 166, which in turn is connected to the side wall of the fan shroud 157 by a passage or duct 168, so that the air and foreign material carried off the exterior sides of the screen is drawn through the ducts and discharged by the fan toward the engine.

We claim:

1. In a self-propelled harvesting machine having a main frame, a forward, elevated operators station mounted on the main frame at one side of the machine, and a forward internal combustion engine mounted on the main frame at the other side of the machine laterally adjacent to the operators station and having associated cooling radiator means, the improvement comprising: engine enclosure means substantially enclosing the engine and the radiator means and including an air inlet means adjacent the operators station and an air outlet means at said other side of the machine and spaced from the operators station; and blower means operatively associated with the engine enclosure means for sequentially moving air through the air inlet means, the radiator means and the air outlet means, directing the air discharged from the air outlet means away from the operators station.

2. The invention defined in claim 1 wherein the engine enclosure means includes inner and outer opposite, generally upright, fore-and-aft side walls, respec tively disposed between the engine and the operators station and at the side of the machine, the air outlet means being disposed in the outer side wall.

3. The invention defined in claim 2 wherein the radiator means is disposed inwardly adjacent to and opposite the air outlet means and the blower means is disposed adjacent to the radiator means within the enclosure and is operative to draw air through the air inlet means, move it through the radiator means and blow it through the air outlet means.

4. The invention defined in claim 3 wherein the blower means comprises an axially transverse, radially bladed fan disposed between the radiator means and the air outlet means.

5. The invention defined in claim 1 and including filter means operatively associated with the air inlet means for filtering the air drawn through the air inlet means.

6. The invention defined in claim 5 wherein the filter means includes at least one screen element and the engine enclosure means includes vane means over the air inlet means for directing a portion of the air moving through the air inlet means along and generally adjacently parallel to the inlet side of the screen element to blow material filtered from the air by the screen element off the screen element.

7. The invention defined in claim 6 and including passage means within the engine enclosure means for conveying said portion of air directed along the screen element and the filtered material carried thereby to the exterior of the engine enclosure means, bypassing the radiator.

8. The invention defined in claim 6 wherein the engine enclosure means includes inner and outer, generally upright, fore-and-aft side walls respectively disposed between the engine and the operators station and at the side of the machine opposite the operators station, a transverse front wall extending between the side walls forwardly of the engine and a generally horizontal top extending between the side walls above the engine and extending rearwardly from the upper edge of the front wall, the air outlet means being disposed in the outer side wall, and the air inlet means being dis-- posed in the top and front wall, the filter means including a top horizontal screen element inwardly adjacent to the top and a front screen element inwardly adjacent to the front wall.

9. The invention defined in claim 8 wherein the vane means includes two sets of parallel louvers respectively in the top and front wall, respectively adjacent and opposite the top and front screen elements, and operative to direct a portion of the air flowing therethrough along the outer surface of the screen elements.

10. The invention defined in claim 9 wherein the set of louvers in the enclosure top has elongated generally fore-and-aft openings between adjacent louvers and the set of louvers in the front wall has elongated, generally upright openings between adjacent louvers, both sets of louvers being operative to deflect air moving through said openings laterally toward the air outlet means.

ll. The invention defined in claim 10 wherein the air outlet means in the outer wall comprises a generally circular opening in said wall and the blower means comprises an axially transverse, radially bladed fan coaxially mounted in the circular opening and operative to draw air through said openings between the louvers, through said screen elements and through the radiator and also to draw a portion of the air deflected by the louvers along the exterior side of the screen elements bypassing the radiator.

12. The invention defined in claim 2 wherein the engine enclosure means includes a generally horizontal top and at least a portion of the air inlet means is located in the top, and including a generally horizontal sound-suppressing baffle element mounted on and spaced above the top in overlying relationship with air inlet means therein and operative to decrease the noise level from the engine at the operators station.

13. The invention defined in claim 2 wherein the operators station includes a seat and the inner side wall of the enclosure means includes a control console between the enclosure means and the seat, the engine being disposed in axially transverse alignment and having a transverse output shaft extending transversely through the inner side wall.

14. In a self-propelled vehicle having a mobile main frame, and an internal combustion engine mounted on the main frame, the improvement comprising: an enclosure means substantially enclosing the engine; heat exchanger means mounted on the main frame within the enclosure means and operative to transmit engine heat to air passing therethrough; air inlet means and air outlet means in the engine enclosure means; fan means disposed within the enclosure means and operative to draw air through the air inlet means, and discharge it through the air outlet means, a first portion of the said air being directed through the heat exchanger means; filter means at the air inlet means for filtering the first portion of the air; and vane means operatively mounted on the enclosure means over the air inlet means to direct a second portion of the air moving through the air inlet means along the exterior side of the filter means to carry away foreign material removed from the first portion of air by the filter means, said second portion of air bypassing the heat exchanger means.

15. The invention defined in claim 14 wherein the filter means includes at least one relatively flat screen element mounted in the air inlet means and the vane means includes a bank of louvers mounted in the air inlet means generally parallel and adjacent to the intake side of the screen element, the louvers deflecting the second portion of the air moving therethrough along the intake side of the screen element.

16. The invention defined in claim 15 wherein the heat exchange means is disposed proximate to and opposite the air outlet means and the fan means comprises a radially bladed fan disposed in the air outlet means and operative to draw said first portion of air through the heat exchange means and said second portion of air along the screen element and to discharge said air portion through the air outlet means.

17. The invention defined in claim 16 wherein the engine enclosure includes opposite side walls and a top and the air outlet means is disposed in one of said side walls and the air inlet means is at least partially disposed in the top.

18. The invention defined in claim 17 wherein the air inlet means is also disposed in a side wall adjacent to the side wall having the air outlet means.

19. In a self-propelled agricultural vehicle having a mobile main frame and an internal combustion engine,

the improvement comprising: an engine enclosure means mounted on the main frame around the engine and including first and second adjacent generally vertical walls and a top wall; an air outlet means disposed in the first vertical wall; an air inlet means disposed in at least one of said other walls; an upright radiator mounted in the enclosure means opposite the air outlet means and between the air outlet means and the engine and operatively connected to the engine for dissipating engine heat to air passing therethrough; and a fan means disposed in the air outlet means and operative to draw air through the air inlet means and the radiator and to discharge the air through the air outlet means.

20. The invention defined in claim 19 and including air filter means between the air inlet means and the radiator for filtering the air drawn through the radiator, and vane means adjacent the inlet side of the filter means for directing a portion of the air drawn through the air inlet means along the inlet side of the filter means and toward the fan means bypassing the filter means and radiator.

21. in a self-propelled harvesting machine having a main frame, a forward, elevated operators station mounted on the main frame at one side of the machine,

and a forward internal combustion engine mounted on the main frame at the other side of the machine laterally adjacent to the operators station and having associated cooling radiator means, the improvement comprising: an engine enclosure means substantially enclosing the engine and the radiator means and including an air-inlet means adjacent to the operators station and an air outlet means; fan means within the engine enclosure for pulling air through the air inlet means and discharging it through the air outlet means, at least a portion of said air moving past the engine and through the radiator means; and air filter means operatively associated with the air inlet means for filtering the air moving through the radiator means.

22. The invention as defined in claim 21 wherein the engine enclosure includes a top wall and a front wall and the air inlet means is located in at least one of said walls, laterally adjacent to the operators station.

23. The invention defined in claim 21 wherein the air outlet means is spaced from the operators station so that the air discharged through the air outlet means is directed away from the operators station. 

1. In a self-propelled harvesting machine having a main frame, a forward, elevated operator''s station mounted on the main frame at one side of the machine, and a forward internal combustion engine mounted on the main frame at the other side of the machine laterally adjacent to the operator''s station and having associated cooling radiator means, the improvement comprising: engine enclosure means substantially enclosing the engine and the radiator means and including an air inlet means adjacent the operator''s station and an air outlet means at said other side of the machine and spaced from the operator''s station; and blower means operatively associated with the engine enclosure means for sequentially moving air through the air inlet means, the radiator means and the air outlet means, directing the air discharged from the air outlet means away from the operator''s station.
 2. The invention defined in claim 1 wherein the engine enclosure means includes inner and outer opposite, generally upright, fore-and-aft side walls, respectively disposed between the engine and the operator''s station and at the side of the machine, the air outlet means being disposed in the outer side wall.
 3. The invention defined in claim 2 wherein the radiator means is disposed inwardly adjacent to and opposite the air outlet means and the blower means is disposed adjacent to the radiator means within the enclosure and is operative to draw air through the air inlet means, move it through the radiator means and blow it through the air outlet means.
 4. The invention defined in claim 3 wherein the blower means comprises an axially transverse, radially bladed fan disposed between the radiator means and the air outlet means.
 5. The invention defined in claim 1 and including filter means operatively associated with the air inlet means for filtering the air drawn through the air inlet means.
 6. The invention defined in claim 5 wherein the filter means includes at least one screen element and the engine enclosure means includes vane means over the air inlet means for directing a portion of the air moving through the air inlet means along and generally adjacently parallel to the inlet side of the screen element to blow material filtered from the air by the screen element off the screen element.
 7. The invention defined in claim 6 and including passage means within the engine enclosure means for conveying said portion of air directed along the screen element and the filtered material carried thereby to the exterior of the engine enclosure means, bypassing the radiator.
 8. The invention defined in claim 6 wherein the engine enclosure means includes inner and outer, generally upright, fore-and-aft side walls respectively disposed between the engine and the operator''s station and at the side of the machine opposite the operator''s station, a transverse front wall extending between the side walls forwardly of the engine and a generally horizontal top extending between the side walls above the engine and extending rearwardly from the upper edge of the front wall, the air outlet means being disposed in the outer side wall, and the air inlet means being disposed in the top and front wall, the filter means including a top horizontal screen element inwardly adjacent to the top and a front screen element inwardly adjacent to the front wall.
 9. The invention defined in claim 8 wherein the vane means includes two sets of parallel louvers respectively in the top and front wall, respectively adjacent and opposite the top and front screen elemeNts, and operative to direct a portion of the air flowing therethrough along the outer surface of the screen elements.
 10. The invention defined in claim 9 wherein the set of louvers in the enclosure top has elongated generally fore-and-aft openings between adjacent louvers and the set of louvers in the front wall has elongated, generally upright openings between adjacent louvers, both sets of louvers being operative to deflect air moving through said openings laterally toward the air outlet means.
 11. The invention defined in claim 10 wherein the air outlet means in the outer wall comprises a generally circular opening in said wall and the blower means comprises an axially transverse, radially bladed fan coaxially mounted in the circular opening and operative to draw air through said openings between the louvers, through said screen elements and through the radiator and also to draw a portion of the air deflected by the louvers along the exterior side of the screen elements bypassing the radiator.
 12. The invention defined in claim 2 wherein the engine enclosure means includes a generally horizontal top and at least a portion of the air inlet means is located in the top, and including a generally horizontal sound-suppressing baffle element mounted on and spaced above the top in overlying relationship with air inlet means therein and operative to decrease the noise level from the engine at the operator''s station.
 13. The invention defined in claim 2 wherein the operator''s station includes a seat and the inner side wall of the enclosure means includes a control console between the enclosure means and the seat, the engine being disposed in axially transverse alignment and having a transverse output shaft extending transversely through the inner side wall.
 14. In a self-propelled vehicle having a mobile main frame, and an internal combustion engine mounted on the main frame, the improvement comprising: an enclosure means substantially enclosing the engine; heat exchanger means mounted on the main frame within the enclosure means and operative to transmit engine heat to air passing therethrough; air inlet means and air outlet means in the engine enclosure means; fan means disposed within the enclosure means and operative to draw air through the air inlet means, and discharge it through the air outlet means, a first portion of the said air being directed through the heat exchanger means; filter means at the air inlet means for filtering the first portion of the air; and vane means operatively mounted on the enclosure means over the air inlet means to direct a second portion of the air moving through the air inlet means along the exterior side of the filter means to carry away foreign material removed from the first portion of air by the filter means, said second portion of air bypassing the heat exchanger means.
 15. The invention defined in claim 14 wherein the filter means includes at least one relatively flat screen element mounted in the air inlet means and the vane means includes a bank of louvers mounted in the air inlet means generally parallel and adjacent to the intake side of the screen element, the louvers deflecting the second portion of the air moving therethrough along the intake side of the screen element.
 16. The invention defined in claim 15 wherein the heat exchange means is disposed proximate to and opposite the air outlet means and the fan means comprises a radially bladed fan disposed in the air outlet means and operative to draw said first portion of air through the heat exchange means and said second portion of air along the screen element and to discharge said air portion through the air outlet means.
 17. The invention defined in claim 16 wherein the engine enclosure includes opposite side walls and a top and the air outlet means is disposed in one of said side walls and the air inlet means is at least partially disposed in the top.
 18. The invention defined in claim 17 wherein the air inlet means is also disposed in a side waLl adjacent to the side wall having the air outlet means.
 19. In a self-propelled agricultural vehicle having a mobile main frame and an internal combustion engine, the improvement comprising: an engine enclosure means mounted on the main frame around the engine and including first and second adjacent generally vertical walls and a top wall; an air outlet means disposed in the first vertical wall; an air inlet means disposed in at least one of said other walls; an upright radiator mounted in the enclosure means opposite the air outlet means and between the air outlet means and the engine and operatively connected to the engine for dissipating engine heat to air passing therethrough; and a fan means disposed in the air outlet means and operative to draw air through the air inlet means and the radiator and to discharge the air through the air outlet means.
 20. The invention defined in claim 19 and including air filter means between the air inlet means and the radiator for filtering the air drawn through the radiator, and vane means adjacent the inlet side of the filter means for directing a portion of the air drawn through the air inlet means along the inlet side of the filter means and toward the fan means bypassing the filter means and radiator.
 21. In a self-propelled harvesting machine having a main frame, a forward, elevated operator''s station mounted on the main frame at one side of the machine, and a forward internal combustion engine mounted on the main frame at the other side of the machine laterally adjacent to the operator''s station and having associated cooling radiator means, the improvement comprising: an engine enclosure means substantially enclosing the engine and the radiator means and including an air inlet means adjacent to the operator''s station and an air outlet means; fan means within the engine enclosure for pulling air through the air inlet means and discharging it through the air outlet means, at least a portion of said air moving past the engine and through the radiator means; and air filter means operatively associated with the air inlet means for filtering the air moving through the radiator means.
 22. The invention as defined in claim 21 wherein the engine enclosure includes a top wall and a front wall and the air inlet means is located in at least one of said walls, laterally adjacent to the operator''s station.
 23. The invention defined in claim 21 wherein the air outlet means is spaced from the operator''s station so that the air discharged through the air outlet means is directed away from the operator''s station. 